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use crate::core::*;
use crate::kw;
use crate::parser::{Parse, Parser, Result};
use crate::token::{Id, NameAnnotation, Span};
/// A WebAssembly global in a module
#[derive(Debug)]
pub struct Global<'a> {
/// Where this `global` was defined.
pub span: Span,
/// An optional name to reference this global by
pub id: Option<Id<'a>>,
/// An optional name for this function stored in the custom `name` section.
pub name: Option<NameAnnotation<'a>>,
/// If present, inline export annotations which indicate names this
/// definition should be exported under.
pub exports: InlineExport<'a>,
/// The type of this global, both its value type and whether it's mutable.
pub ty: GlobalType<'a>,
/// What kind of global this defined as.
pub kind: GlobalKind<'a>,
}
/// Different kinds of globals that can be defined in a module.
#[derive(Debug)]
pub enum GlobalKind<'a> {
/// A global which is actually defined as an import, such as:
///
/// ```text
/// (global i32 (import "foo" "bar"))
/// ```
Import(InlineImport<'a>),
/// A global defined inline in the module itself
Inline(Expression<'a>),
}
impl<'a> Parse<'a> for Global<'a> {
fn parse(parser: Parser<'a>) -> Result<Self> {
let span = parser.parse::<kw::global>()?.0;
let id = parser.parse()?;
let name = parser.parse()?;
let exports = parser.parse()?;
let (ty, kind) = if let Some(import) = parser.parse()? {
(parser.parse()?, GlobalKind::Import(import))
} else {
(parser.parse()?, GlobalKind::Inline(parser.parse()?))
};
Ok(Global {
span,
id,
name,
exports,
ty,
kind,
})
}
}